What is the best way to seal new plaster before painting?

Related questions

1. Is Mod Podge the same as Elmer's Glue?
2. What is the strongest glue for plastic?
3. How do you seal MDF with PVA glue?
4. Can PVA glue be mixed with acrylic paint?
5. Do you water down PVA glue for paper mache?
6. Is all PVA glue acid free?
7. Is PVA primer necessary?
8. Can PVA be used as a sealant?
9. Is PVA glue environmentally friendly?
10. How long does PVA glue take to dry?

Tags

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5. #adhere
6. #absorbent
7. #watered
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9. #water
10. #first
11. #better
12. #known
13. #emulsion